Tack-strip



(No Model.)

B. WOODWARD & G. W. COPELAND.

TACK STRIP.

N0. 333,709. Patented Jan. 5, 1886.

Fig.5

Fig.7

Fig-5 WITN E5555 INA/ENTERS MWWDL UNITED STATES PATENT OFFIC ERASTUSWOODWARD, OF SOMERVILLE, AND GEORGE \V. COPELAND, OF MALDEN,MASSACHUSETTS.

TACK-STRIP.

SPECIFICATION forming part of Letters Patent No; 333,709, dated January5, 1886.

Application filed July 18, 1884.

To all whom it may concern:

Be it known that we, ERASTUS WooDwARD, of Somerville, and GEORGE W.COPELAND, of Malden, both in the county of Middlesex and State ofMassachusetts, citizens of the United States, have invented new anduseful Improvements in Tack-Strips, of which the following is a full,clear, and exact description, reference being had to the accompanying 1odrawings, forming a part of this specification in explaining its nature,in which- Figure 1 shows in perspective a blank from which thetack-strip is formed. Fig. 2 represents the completed tack-strip. Fig. 3is a plan View thereof. Fig. dis an end elevation of the strip. Figs. 5,6, and 7 illustrate a modification, hereinafter referred to.

The invention is an improvement upon that described in our pendingapplications for Letters Patent of the United States, filed,respectively, December 31, 1883, Serial N 0. 116,158, and December 31,1883, Serial No. 115,440. In said applications we have described twoforms of tack-strips, each of which has a con- 2 tinuous head-formingportion, the head-forming portion of one being of substantially the samewidth throughout the length of the strip, and the head-forming portionof the other being enlarged or widened immediately over the 0 separateshanks of the strip, the shanks, however, being connected by the narrowsections of the headforming portion of the strip.

The present invention comprises a tackstrip the shanks of which areconnected with 3 5 each other, but only by a thin web or section of theplate from which the blank is punched or formed, and the heads of whichare separated and perfectly formed. This tack-strip we prefer to formfrom a blank shaped as shown in Fig. 1. This blank is preferably formedfrom a flat metal plate by punching in the manner described in PatentNo. 183,616, granted Erastus Woodward, dated October 24, 1876, and byforming the deep notches in the upper edge of the blank. These notchesseparate the upper edge of the blank into head-forming sections, andeach of these headforming sections is above the connecting portion ofthe blank, and which connects the Serial No. 138,013. (No model.)

shanks of the strip together. Each of these head-forming sections isalso located at the end of a shank, so that each shank of the strip hasa separate head-forming portion. The blank thus prepared is thensubmitted to suitable upsetting mechanism, which, by end pressure orblows upon the ends of the headforming portions, upsets or displaces themetal 7 of these sections from the shape represented in Fig. 1 to theshape of fiat, well-formed heads, as represented in Fig. 2, and theseheads are not directly connected with each other by any head-forlningportion of the strip. This construction enables us to obtain a veryperfectly-formed tack, and one that can be easily severed from thestrip, as they are held together by a very thin and narrow uncut sectionof the strip from which the shanks are cut, but which does not form anyportion of the head.

In the drawings, a represents the blank from which the tack-strip isformed; a, the headforming portions separated by deep notches a; a thenarrow connecting portion of the blank, which in Figs. 1 and 2 isrepresented as immediately below the head-forming portion, but which maybe somewhat removed from the head-forming portion, if desired; and inFigs. 5, 6, and 7 we have shown such a modification. When, however, thisform of connection is used, it is desirable in separating the tacks fromthe strip to punch out or otherwise remove the thin connecting-webbetween the shanks, so as to leave the shanks without protection.

In the completed tack -strip 1) represents the separate heads of eachshank, and c the shanks, and (Z the connecting-web.

The shanks, it will be observed, have very well-defined and sharppoints, but in this respect they do not differ from those described inour said application.

The separate tacks will each have shanks, two surfaces of which areparallel and two edges inclined, forming a flat sharp point and an upsethead.

In our application filed December 31, 1883, Serial No. 116,158, we havedescribed a tackstrip of which this is a modified form, andwe would beunderstood as not claiming herein with the shanks and upon or above theupper 10 anything which we have claimed in said apsurface of the web,all substantially as and for plication. the purposes described.

Having thus fully described our invention 5 we claim and desire tosecure by Letters Patent of the United States A tack-strip comprisingthe web a the NVi-tnesses: shanks c, projecting therefrom, and the inde-F. F. RAYMOND, 2d,

pendent or separate heads 1), formed in line J. M. DOLAN.

